Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Sales revenue from energy operations	$ 3,891		$ 2,786
Real estate	358		281
Total operating revenue	4,249		3,067
Depreciation and amortization - energy operations	475		384
Depreciation and amortization	482		389
Operating income	950		773
Interest expense	(418)		(290)
Capitalized interest	29		21
Allowance for equity funds	27		19
Other, net	16		16
Income before income tax expense and equity income	604		539
Assets	71,129				70,000
PacifiCorp [Member]
Segment Reporting Information [Line Items]
Sales revenue from energy operations	1,288		1,232
Depreciation and amortization - energy operations	183		172
Operating income	292		300
Interest expense	96		97
Assets	22,932				22,885
MidAmerican Funding [Member]
Segment Reporting Information [Line Items]
Sales revenue from energy operations	1,230		921
Depreciation and amortization - energy operations	84		107
Operating income	153		106
Interest expense	46		41
Assets	14,132				13,992
NV Energy, Inc. [Member]
Segment Reporting Information [Line Items]
Sales revenue from energy operations	638		0
Depreciation and amortization - energy operations	92		0
Operating income	107		0
Interest expense	70		0
Assets	14,297				14,233
MidAmerican Energy Pipeline Group [Member]
Segment Reporting Information [Line Items]
Sales revenue from energy operations	386		300
Depreciation and amortization - energy operations	48		50
Operating income	230		180
Interest expense	19		20
Assets	4,936				4,908
Northern Powergrid Holdings [Member]
Segment Reporting Information [Line Items]
Sales revenue from energy operations	317		300
Depreciation and amortization - energy operations	48		43
Operating income	181		180
Interest expense	38		35
Assets	7,066				6,874
MidAmerican Renewables [Member]
Segment Reporting Information [Line Items]
Sales revenue from energy operations	69		57
Depreciation and amortization - energy operations	21		15
Operating income	29		30
Interest expense	41		25
Assets	4,049				3,875
HomeServices [Member]
Segment Reporting Information [Line Items]
Real estate	358		281
Depreciation and amortization	7		5
Operating income	(12)		3
Interest expense	1		0
Assets	1,384				1,381
Berkshire Hathaway Energy And Other [Member]
Segment Reporting Information [Line Items]
Sales revenue from energy operations	(37)	[1]	(24)	[1]
Depreciation and amortization - energy operations	(1)	[1]	(3)	[1]
Operating income	(30)	[1]	(26)	[1]
Interest expense	107	[1]	72	[1]
Assets	$ 2,333	[1]			$ 1,852	[1]

[1] The differences between the reportable segment amounts and the consolidated amounts, described as Berkshire Hathaway Energy and Other, relate to corporate functions, MidAmerican Transmission, LLC, other corporate entities and intersegment eliminations.